This is clearly Richard Kiel's (Jaws from 007) retainer. The screw connects to his head gear (which is not pictured) to further assist in maintaining precise alignment of his steel teeth.Hip Hip Array - XL Abusive comment hidden. (Show it anyway.)
It's an ice cube warmer with attached run-off collectorPixelate - XL Abusive comment hidden. (Show it anyway.)
Hip Hip Array - XL